Error when loading saved date : SerializationException: End of Stream encountered before parsing was completed.

Hello, I have made a save/load system, it worked perfectly until now, but now it shows me this error. I haven't touched anything in the code. Could you please help me ?

The error :

SerializationException: End of Stream encountered before parsing was completed. System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run () (at :0) System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize (System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Runtime.Serialization.Formatters.Binary.__BinaryParser serParser, System.Boolean fCheck, System.Boolean isCrossAppDomain, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck, System.Boolean isCrossAppDomain, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler) (at :0) System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream) (at :0) SaveSystem.LoadData () (at Assets/Scripts/Save-Load/SaveSystem.cs:29)

My code :

 using UnityEngine;
 using System.IO;
 using System.Runtime.Serialization.Formatters.Binary;
 
 public static class SaveSystem
 {
     public static void SaveData(DataStorage dataStorage)
     {
         BinaryFormatter formatter = new BinaryFormatter();
         string path = Path.Combine(Application.persistentDataPath, "storedData.dat");
 
         using (FileStream stream = File.Create(path))
         {
             PlayerData data = new PlayerData(dataStorage);
             formatter.Serialize(stream, data);
         }
 
     }
 
     public static PlayerData LoadData()
     {
         string path = Path.Combine(Application.persistentDataPath, "storedData.dat");
 
         if (File.Exists(path))
         {
             BinaryFormatter formatter = new BinaryFormatter();
             using (FileStream stream = File.Open(path,FileMode.Open))
             {
                 PlayerData data = formatter.Deserialize(stream) as PlayerData;
                 return data;
             }
             
         }
 
         else
         {
             Debug.LogError("Save file not found in " + path);
             return null;
         }
     }
 }